There is a new local privilege escalation exploit for Windows 8 that has appeared at Exploit-db. This is a Python based exploit that attacks CVE 2014-4113 and was patched in MS 14-058. I tried the exploit on a couple of virtual machines though, and could not make it work.

There is a new local privilege escalation exploit for Windows 7 (x86) that has appeared at Exploit-db. This one appears to attack CVE 2015-0003 and was patched in MS 15-010.

There is also a new local privilege escalation exploit available for recent Ubuntu systems using apport; this one also appeared at Exploit-db. This exploits
CVE 2015-1325, though this has not yet made it into the official MITRE database.